{"instruction": "You are an expert in event extraction. Please extract events from the input that conform to the schema definition. Return an empty list for events that do not exist, and return NAN for arguments that do not exist. If an argument has multiple values, please return a list. Respond in the format of a JSON string.", "schema": [{"event_type": "adverse event", "trigger": true, "arguments": ["Subject", "Treatment", "Combination.Drug", "Treatment.Dosage", "Treatment.Drug", "Effect", "Treatment.Disorder", "Treatment.Duration", "Subject.Disorder", "Subject.Age", "Subject.Gender", "Treatment.Freq", "Treatment.Route", "Treatment.Time_elapsed", "Subject.Race", "Subject.Population"]}, {"event_type": "potential therapeutic event", "trigger": true, "arguments": ["Treatment.Duration", "Treatment.Time_elapsed", "Subject.Population", "Treatment.Dosage", "Treatment.Route", "Subject.Gender", "Treatment.Freq", "Treatment.Disorder", "Combination.Drug", "Subject.Age", "Treatment", "Subject.Disorder"]}], "input": "Chronic hydroxychloroquine use associated with QT prolongation and refractory ventricular arrhythmia."}
{"adverse event": [{"trigger": "associated ", "arguments": {"Subject": "NAN", "Treatment": "Chronic hydroxychloroquine", "Combination.Drug": "NAN", "Treatment.Dosage": "NAN", "Treatment.Drug": "hydroxychloroquine", "Effect": "QT prolongation and refractory ventricular arrhythmia", "Treatment.Disorder": "NAN", "Treatment.Duration": "NAN", "Subject.Disorder": "NAN", "Subject.Age": "NAN", "Subject.Gender": "NAN", "Treatment.Freq": "NAN", "Treatment.Route": "NAN", "Treatment.Time_elapsed": "NAN", "Subject.Race": "NAN", "Subject.Population": "NAN"}}], "potential therapeutic event": []}